Network Rail has said all lines have now reopened but trains between Romford and London Liverpool Street may still be cancelled, delayed by up to 60 minutes or revised.

Disruption is expected until around 2pm.

Greater Anglia has confirmed there is disruption to its trains heading into and out of Liverpool Street and TFL tweeted to say that Network Rail and emergency services are on site dealing with the incident.

A TFL spokesman said: “Our staff are highly trained in dealing with a difficult and sensitive situation like this and under the circumstances this may take a little longer than expected.

“We thank you for your understanding.”

A British Transport Police spokesman said officers are working to identify the person and inform their family.